JP2001325816A - Headlight for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly adapt a light intensity distribution pattern and emission angles of an emission beam to immediately cope with a vehicle driving condition in a headlight for a vehicle housing a lamp unit emitting forward a beam of a prescribed light intensity pattern inside of a lamp body. SOLUTION: This headlamp is provided with a unit inclination control mechanism 60 which inclines a lamp unit 20 in the vertical direction for moving a light distribution pattern thereof upward and downward, according to a vehicle driving condition and a light intensity distribution variable control mechanism 42 causing a shade 32 of the lamp unit 20 to more for varying the light intensity distribution thereof. Beam emission controls by the unit inclination control mechanism 60 and the light intensity distribution variable control mechanism 42 are suitably combined for immediately adapting the light intensity distribution and the emission angles of the emission beam to the vehicle driving condition and a visibility of a road surface in front of the vehicle is aimed at improving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular headlamp in which a lamp unit for irradiating a beam forward with a predetermined light distribution pattern is accommodated inside a lamp body.

[0002]

2. Description of the Related Art Conventionally, as a configuration of a vehicle headlamp,
A lamp body in which a lamp unit is housed is known. For example, Japanese Patent Application Laid-Open No. H10-14717
As disclosed in Japanese Patent Laid-Open Publication No. 5 (1999) -2005, there is also known a vehicular headlamp configured to tilt a lamp unit in a vertical direction according to a vehicle speed, a vehicle attitude, and the like.

[0003]

However, simply tilting the lamp unit up and down simply moves the light distribution pattern up and down with the same shape. Irradiation is difficult.

[0004] The present invention has been made in view of such circumstances, and a vehicle headlamp in which a lamp unit that irradiates a beam forward in a predetermined light distribution pattern is housed inside a lamp body. It is an object of the present invention to provide a vehicle headlamp capable of irradiating a beam with a light distribution pattern and an irradiating angle corresponding to a vehicle running situation.

[0005]

According to the present invention, a light unit is tilted up and down to move its light distribution pattern up and down, and at the same time, the components of the lamp unit are moved to change the light distribution pattern itself. By doing so, the object is achieved.

That is, a vehicle headlamp according to the present invention is a vehicle headlamp in which a lamp unit for irradiating a beam forward in a predetermined light distribution pattern is accommodated inside a lamp body. A light distribution variable control mechanism that changes the light distribution pattern by moving the components of the lamp unit according to the situation, and a unit tilt control mechanism that vertically tilts the lamp unit according to the vehicle traveling situation, It is characterized by comprising.

The specific structure of the "lamp unit" is not particularly limited. For example, a so-called parabolic lamp unit having a reflector formed on the basis of a paraboloid of revolution or a vehicle longitudinal direction A light source disposed substantially coaxially with an optical axis extending to the light source, a reflector for reflecting light from the light source forward toward the optical axis, a condenser lens provided in front of the reflector, A so-called projector-type lamp unit or the like including a shade provided between the lens and the reflector and shielding a part of light reflected from the reflector can be adopted.

The specific structure of the light source of the "lamp unit" is not particularly limited.
It may be a discharge light emitting portion of a discharge bulb, or a filament of an incandescent bulb such as a halogen bulb.

The "vehicle running condition" means various state quantities and external information related to the running of the vehicle, and includes, for example, a vehicle speed, a steering angle, a vehicle attitude, an inter-vehicle distance to a preceding vehicle, Weather, navigation information, etc. correspond.

The "component" of the lamp unit is not limited to a specific component as long as the light distribution pattern of the lamp unit can be changed by moving the component. , A shade, a light source bulb, a reflector and the like can be adopted.

[0011]

As described above, in the vehicle headlight according to the present invention, the components of the lamp unit housed in the lamp body are controlled by the variable light distribution control mechanism in accordance with the running condition of the vehicle. The light distribution pattern is changed by moving the light distribution pattern, and the light distribution pattern is moved up and down by tilting the lamp unit up and down by a unit tilt control mechanism. By appropriately combining the beam irradiation control by the variable light control mechanism, the beam irradiation can be performed with the light distribution pattern and the irradiation angle corresponding to the traveling condition of the vehicle. Thereby, the visibility of the road surface in front of the vehicle can be improved.

In the above configuration, if a projector type lamp unit is adopted as the lamp unit, the following operation and effect can be obtained.

That is, the vehicle headlamp according to the present invention has a structure in which the components of the lamp unit are moved and the lamp unit itself is tilted up and down. It is necessary to secure inside. Therefore, the space can be reduced by employing a projector-type lamp unit in which the lamp unit itself can be made compact. Moreover, in a projector-type lamp unit, there are many types of components that can be selected as moving targets for changing the light distribution pattern (for example, a condensing lens can also be selected). It is possible to easily make a configuration suitable for the lamp structure of the headlamp.

In this case, if a shade is adopted as a component to be moved, it is possible to easily change the light distribution pattern delicately by the movement, and thereby, a light distribution pattern more suitable for a vehicle running condition can be obtained. Obtainable.

The vehicle headlamp according to the present invention may have a configuration in which a single lamp unit is housed in a lamp body, or another lamp unit in the lamp body together with the lamp unit. The configuration may be housed. In the latter configuration, the lamp unit is supported by a unit support member together with another lamp unit, and the unit support member is tilted up and down by a unit tilt control mechanism. With respect to the unit as well, it is possible to perform beam irradiation at an irradiation angle according to the vehicle running condition, and the visibility of the road surface in front of the vehicle can be further improved. The type of the “other lamp unit” is not particularly limited. For example, a unit that irradiates a spot-like beam in order to increase the luminous intensity of the central part of the light distribution pattern, or the right and left diffusion of the light distribution pattern A device that irradiates a beam that widens right and left to secure a wider angle can be used.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment of the present invention will be described.

FIG. 1 is an overall configuration diagram showing a vehicle headlamp according to the present embodiment.

As shown, the vehicle headlamp 100
Is a headlight main body 10, a shade driving circuit 102, a unit driving circuit 104, and a control unit 106.
And is provided. The control unit 10
6 includes a beam switch 108 and a steering angle sensor 11.
0, detection signals from the vehicle speed sensor 112, the following distance sensor 114, and the vehicle height sensor 116 are input.

The beam switching switch 108 is a switch for selectively switching between a low beam light distribution pattern and a high beam light distribution pattern. Inter-vehicle distance sensor 1
Reference numeral 14 includes a millimeter-wave laser radar or the like. The vehicle height sensor 116 is constituted by a displacement sensor mounted on a suspension mechanism for the front and rear wheels.

In the vehicle headlamp 100, beam irradiation control is performed in accordance with the vehicle traveling condition based on a control signal from the control unit 106. Before describing the content of the beam irradiation control, the configuration of the headlamp main body 10 will be described first.

FIG. 2 is a side sectional view showing the headlamp main body 10 described above.

As shown in the drawing, the headlamp main body 10 has a lamp unit 20 housed in a lamp room formed by a transparent transparent cover 12 and a lamp body 14.

The lamp unit 20 is supported on the lamp body 14 via an aiming mechanism 50 so as to be tiltable in the vertical and horizontal directions. This aiming mechanism 5
Reference numeral 0 denotes a lamp unit 2 attached to an aiming screw 52 rotatably attached to a plurality of locations of the lamp body 14 (one location is an output shaft 62a of a motor 62 described later).
0 aiming bracket 54 is aiming nut 56
Are connected via The aiming mechanism 50 can perform initial adjustment of the optical axis Ax of the lamp unit 20.

At the aiming fulcrum A in the vertical direction of the aiming mechanism 50, a unit tilt control mechanism 60 for tilting the lamp unit 20 in the vertical direction according to the running condition of the vehicle is provided.

The unit tilt control mechanism 60 includes a motor 62 mounted on the lamp body 14, the unit drive circuit 104 connected to the motor 62, and the control unit 106. In the unit tilt control mechanism 60, the motor 62 is driven by the unit drive circuit 104 in accordance with a control signal from the control unit 106, and the output shaft 62
a, whereby the lamp unit 20 is moved upward from the initial adjustment position (the position where the optical axis Ax coincides with the vehicle front-rear direction) by an angle β around the vertical aiming point B in the aiming mechanism 50. (Β = 1 °) and can be tilted downward within an angle range of an angle γ (γ = 2 °).

FIG. 3 is a side sectional view showing the lamp unit 20. FIG. 4 is a detailed view of a main part of FIG.
FIG. 5 is a view in the direction of arrow V in FIG. 4.

As shown in FIG. 3, this lamp unit 20
Is a projector type lamp unit, which includes a discharge bulb 22, a reflector 24, a holder 26, a condenser lens 28, a retaining ring 30, and a shade 32.
And a shade driving mechanism 34.

The discharge bulb 22 is a metal halide bulb whose discharge light emitting portion 22a (light source) has an optical axis A.
It is attached to the reflector 24 so as to be arranged coaxially with x.

The reflector 24 has a substantially elliptical spherical reflecting surface 24a centered on the optical axis Ax. The reflection surface 24a has an elliptical cross section including the optical axis Ax, and is set so that the eccentricity gradually increases from the vertical cross section to the horizontal cross section. However, the vertices on the rear side of the ellipse forming these cross sections are set at the same position. The light source 22a is arranged at an elliptical first focal point F1 that forms a vertical section of the reflection surface 24a. Thereby, the reflection surface 24a reflects the light from the light source 22a forward toward the optical axis Ax. At this time, the second focal point F2 of the ellipse in the vertical section including the optical axis Ax. Is approximately converged.

The holder 26 is formed in a cylindrical shape so as to extend forward from an opening at the front end of the reflector 24, and is fixedly supported at the rear end by the reflector 24 and has a retaining end at the front end. The condenser lens 28 is fixedly supported via a ring 30.
At the lower end of the holder 26, a notch 26a is formed.

The condenser lens 28 is a plano-convex lens having a convex front surface and a flat rear surface, and the rear focal position of which is the second focal point F of the reflecting surface 24a of the reflector 24.
2 are arranged. As a result, the condensing lens 28 is connected to the reflecting surface 24a of the reflector 24.
The reflected light from the light source is condensed near the optical axis Ax and transmitted.

The shade 32 has a shade main body 32A extending substantially along a vertical plane perpendicular to the optical axis Ax.
A substantially semi-cylindrical portion 32B extending forward from the periphery of the shade main body portion 32A; and a bracket portion 32C extending downward from the lower end of the substantially semi-cylindrical portion 32B through the notch 26a of the holder 26. , Is rotatably provided below the internal space of the holder 26. That is, the shade 32 is supported by the holder 26 via the rotating pins 36 at the upper front ends on both the left and right sides of the substantially semi-cylindrical portion 32B, whereby the low beam forming position is formed around the horizontal axis connecting the rotating pins 36. (A solid line position in the drawing) and a high beam forming position (a two-dot chain line position in the drawing).

When the shade 32 is at the low beam forming position, the upper end edge 32Aa of the shade main body 32A is disposed so as to pass through the second focal point F2, and shields a part of the reflected light from the reflecting surface 24a. Thus, the upward irradiation light emitted from the lamp unit 20 is removed, thereby obtaining low-beam irradiation light (a beam indicated by a solid line) irradiated downward with respect to the optical axis Ax. As a result, a low-beam light distribution pattern P (L) having a left-hand light distribution having a so-called Z-shaped cutoff line CL having a step difference between the right and left as shown in FIG. 6A is formed. On the other hand, when the shade 32 is at the high beam forming position, the shade 32 releases the shielding of the reflected light from the reflection surface 24a and allows the upward irradiation light from the lamp unit 20 to be emitted. (A beam indicated by a solid line and a two-dot chain line). Thus, a high beam light distribution pattern P (H) as shown in FIG. 6B is formed. The area indicated by HZ in the low beam light distribution pattern P (L) and the high beam light distribution pattern P (H) is a hot zone (high light intensity area) in each of these light distribution patterns.

The shade driving mechanism 34 includes a motor driving unit 38 and a tension coil spring 40, and rotates the shade 32 between the low beam forming position and the high beam forming position, and stops at an arbitrary position therebetween. It is possible to make it. By this, the beam is switched between the low beam and the high beam, and the shade 32 is stopped at an intermediate position between the low beam configuration position and the high beam configuration position, so that an intermediate light distribution pattern between the low beam distribution pattern and the high beam distribution pattern is obtained. Can be used for beam irradiation. In the present embodiment, as indicated by the broken line in FIG. 4, the high beam configuration position (HI) is slightly higher than the low beam configuration position (LOW).
GH) The shade 32 can be stopped at an intermediate position (LOW + α) closer to (GH). The angle α is α = 0.
It is set to 5 °.

The motor drive section 38 has an output shaft 38
a is arranged so as to extend in parallel with the optical axis Ax,
Motor housing 2 formed in the lower area of reflector 24
4b. This motor drive unit 38
The output shaft 38a is configured to move in the vehicle front-rear direction via a gear (not shown) by driving a motor (not shown). The front end spherical portion of the output shaft 38a comes into contact with the bracket portion 32C of the shade 32. ing.

The tension coil spring 40 is disposed so as to extend in parallel with the optical axis Ax. The front end of the extension coil spring 40 is engaged with the bracket 32C of the shade 32, and the rear end of the extension coil spring 40 extends downward from the motor housing 24b. It is locked by the tab 24c formed so as to protrude. This tension coil spring 4
Numeral 0 is designed to always elastically urge the shade 32 toward the low beam forming position, thereby absorbing the backlash of the motor drive unit 38 and preventing the shade 32 from rattling. Has become.

As shown in FIG. 1, the motor driving section 38 of the shade driving mechanism 34
2, and is driven by the shade drive circuit 102 in response to a control signal from the control unit 106. And these shade driving mechanisms 3
4. The light distribution variable control mechanism 42 that changes the light distribution pattern of the lamp unit 20 by moving the shade 32 according to the vehicle running condition is configured by the shade drive circuit 102 and the control unit 106.

Next, the vehicle headlamp 10 according to the present embodiment will be described.
The content of the beam irradiation control performed at 0 will be described.

In the present embodiment, the unit tilt control mechanism 60 and the variable light distribution control mechanism 42 perform beam irradiation control in accordance with the running condition of the vehicle.

That is, when the vehicle is traveling on a straight flat road at a constant speed, beam irradiation is performed in a light distribution pattern as shown in FIG. At this time, the unit tilt control mechanism 60 sets the lamp unit 20 to the initial adjustment position (the position where the optical axis Ax coincides with the vehicle front-rear direction), and the variable light distribution control mechanism 42 operates the beam switch 108. , The shade 32 is moved to the low beam configuration position or the high beam configuration position, whereby the low beam light distribution pattern P (L) shown in FIG.
Alternatively, the high beam light distribution pattern P shown in FIG.
In (H), beam irradiation is performed.

Even when the vehicle is traveling on a straight flat road, when the vehicle is inclined in the front-rear direction due to acceleration or deceleration of the vehicle, the low beam light distribution pattern P
(L) is also displaced in the vertical direction as shown by the two-dot chain line in FIG. Therefore, the unit tilt control mechanism 60
Is configured to tilt the lamp unit 20 in the vertical direction to perform optical axis correction (so-called auto-leveling) corresponding to the front-back inclination angle of the vehicle. In this optical axis correction, the control unit 106 calculates the front-back inclination angle of the vehicle based on a detection signal from each vehicle height sensor 116 disposed on the suspension mechanism of the front and rear wheels of the vehicle, and the unit is determined by the calculated value. This is performed by driving the motor 62 via the drive circuit 104.

Although such beam irradiation control is performed in the same manner in the high beam light distribution pattern P (H), it is particularly important in the low beam light distribution pattern P (L) having the cutoff line CL. The light distribution pattern P (L) will be described as a representative. The same applies to the following.

When the vehicle speed is equal to or less than a predetermined value (for example, 5 km / h or less) and the inter-vehicle distance to the preceding vehicle is equal to or less than a predetermined distance (for example, 5 m or less) during running of the vehicle, the unit tilt control mechanism 60 is controlled. In FIG. 7, the lamp unit 20 is tilted downward to the maximum, and the low beam light distribution pattern P (L) is directed downward as shown in FIG. 7B. Thus, when the own vehicle is stopped or in a sloppy running state close to the stop and the preceding vehicle is in front of the own vehicle, an unnecessary upward scattered light component included in the irradiation beam from the lamp unit 20 is moved forward. This effectively prevents the light from entering the rearview mirror or the like of the car and giving glare to the driver of the preceding vehicle. This optical axis correction is performed by the control unit 106 driving the motor 62 via the unit drive circuit 104 based on detection signals from the vehicle speed sensor 112 and the following distance sensor 114.

On the other hand, when the inter-vehicle distance to the preceding vehicle is longer than a predetermined distance (for example, 50 m or more) while the vehicle is running,
The light distribution variable control mechanism 42 moves the shade 32 to an intermediate position 0.5 ° upward from the low beam configuration position, thereby, as shown in FIG. 8A, the position of the low beam light distribution pattern P (L). The position of the cutoff line CL is displaced upward by 0.5 ° without changing itself. Thus, the low-beam light distribution pattern P (L) (particularly, the hot zone HZ) is expanded to the distant side, so that the distance visibility on the road surface ahead of the vehicle is sufficiently enhanced. Since the inter-vehicle distance with the preceding vehicle is generally long during high-speed running, the vehicle running safety during high-speed running can be enhanced by ensuring sufficient distant visibility in this way. In this case, since the inter-vehicle distance with the preceding vehicle is sufficiently ensured, even if the cutoff line CL is displaced upward by 0.5 °, a great glare is not given to the driver of the preceding vehicle. Absent. The movement of the cutoff line CL is performed by the control unit 106 driving the motor drive unit 38 of the shade drive mechanism 34 via the shade drive circuit 102 based on a detection signal from the following distance sensor 114. I have.

If the position of the cut-off line CL is only to be displaced upward by 0.5 °, the lamp unit 20 is tilted upward by the unit tilt control mechanism 60 so that the low-beam light distribution pattern P (L) is set to 0.1 mm. This can also be achieved by displacing 5 ° upwards. However, by performing this by the variable light distribution control mechanism 42, the low beam light distribution pattern P
While maintaining the position of (L) (particularly the position of the hot zone HZ) at the original position (the position of FIG. 6A), the low beam light distribution pattern P (L) (particularly the hot zone HZ)
Can be expanded upward, whereby the forward visibility by the original low beam light distribution pattern P (L) can be ensured, and the far visibility can be further enhanced.

The variable light distribution control mechanism 42 is also used when a rightward steering operation is performed while the vehicle is running.
The shade 32 is moved to an intermediate position 0.5 ° upward from the low beam forming position. As a result, as shown in FIG. 8B, the position of the cutoff line CL of the low beam light distribution pattern P (L) is set to 0.5.
° Displaced upward to improve the visibility of the road ahead in the distance when the vehicle turns right. The movement of the cutoff line CL is performed by the control unit 106 driving the motor drive unit 38 of the shade drive mechanism 34 via the shade drive circuit 102 based on the detection signal from the steering angle sensor 110. I have. Since the cut-off line CL has a right half down, the cut-off line CL moves upward when the steering operation is performed to the right, but the steering operation is performed to the left. At times, the cutoff line CL is not moved upward from the viewpoint of preventing glare from the oncoming vehicle driver.

As described in detail above, the vehicle headlamp 100 according to the present embodiment is provided with the shade 3 of the lamp unit 20 housed in the lamp body 14 in accordance with the running condition of the vehicle.
2 is moved by the variable light distribution control mechanism 42 to change its light distribution pattern, and the unit tilt control mechanism 60
Is configured to tilt the lamp unit 20 in the vertical direction to move the light distribution pattern up and down.
Beam irradiation can be performed with a light distribution pattern and an irradiation angle that are immediately adapted to the vehicle running conditions. Thereby, the visibility of the road surface in front of the vehicle can be improved.

Further, in this embodiment, since a projector-type lamp unit is employed as the lamp unit 20, not only the lamp unit 20 itself can be made compact, but also the shade 32 for moving the shade 32 thereof can be used. The shade drive mechanism 34 can also be configured compactly, which allows the vehicle headlamp 100
Can be configured more flexibly.

In this embodiment, since the shade 32 is employed as a component to be moved for changing the light distribution pattern, the position of the cutoff line CL is slightly changed by the movement of the shade 32. This makes it possible to easily obtain a low-beam light distribution pattern P (L) that is more suitable for the vehicle driving situation.

Next, a second embodiment of the present invention will be described.

FIG. 9 is a front view showing a headlamp main body 10 'of the vehicle headlamp according to the present embodiment.

As shown in the figure, also in the headlamp main body 10 'according to the present embodiment, similarly to the first embodiment, the lamp unit 20 is provided in the lamp room formed by the transparent transparent cover 12 and the lamp body 14. In the present embodiment, the lamp unit 20 and the lamp unit 70 (another lamp unit) for wide diffusion irradiation are housed in the lamp chamber in a state of being supported by the unit support member 72 in the present embodiment. I have. The unit support member 72 is vertically tilted by a unit tilt control mechanism (not shown) similar to the first embodiment provided at the vertical aiming action point A. This tilting is performed about a straight line connecting two aiming points B in the vertical direction in the left and right directions.

The lamp unit 70 for wide diffusion irradiation is as follows.
A parabolic lamp unit comprising a halogen bulb 7
4 and a reflector 76. This reflector 76 has a reflecting surface 7 formed based on a paraboloid of revolution.
6a, so that the light from the halogen bulb 74 is diffusely reflected in the left-right direction toward the front.
As a result, as shown in FIG. 10, the low beam light distribution pattern P formed by the lamp unit 20 is formed.
(L) and a wide diffused light distribution pattern P (w) that is wider in the left-right direction than the high beam light distribution pattern P (H). This wide diffusion light distribution pattern P
The formation position of (w) is set so that the upper end edge thereof is substantially the same height as the lower right portion of the cutoff line CL of the low beam light distribution pattern P (L).

By additionally forming the above-mentioned wide diffusion light distribution pattern P (w), it is possible to irradiate the road surface in front of the vehicle widely to the left and right. This also makes it possible to set the left and right diffusion angles of the low-beam light distribution pattern P (L) and the high-beam light distribution pattern P (H) to be smaller, thereby illuminating the front area of the road surface in front of the vehicle more brightly. Thus, the visibility of the road surface ahead of the vehicle can be sufficiently improved.

At this time, when the unit support member 72 is tilted up and down, the lamp unit 70 is tilted up and down together with the lamp unit 20. Therefore, when the beam irradiation control by the unit tilt control mechanism is performed, a wide diffuse light distribution is performed. The pattern P (w) can be moved up and down together with the low beam light distribution pattern P (L) or the high beam light distribution pattern P (H), whereby the visibility of the road surface in front of the vehicle can be further improved.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a vehicle headlamp according to a first embodiment of the present invention.

FIG. 2 is a side sectional view showing a headlamp main body of the vehicle headlamp.

FIG. 3 is a side sectional view showing a lamp unit of the headlight main body.

FIG. 4 is a detailed view of a main part of FIG. 3;

5 is a view in the direction of arrow V in FIG. 4;

FIG. 6 is a diagram showing a light distribution pattern emitted from the headlight main body to the front of the vehicle.

FIG. 7 is a diagram showing a light distribution pattern for explaining the content of beam irradiation control by the unit tilt control mechanism of the vehicle headlamp.

FIG. 8 is a diagram showing a light distribution pattern for explaining the contents of beam irradiation control by the light distribution variable control mechanism of the vehicle headlamp.

FIG. 9 is a front view showing a headlamp main body of a vehicle headlamp according to a second embodiment of the present invention.

FIG. 10 is a diagram showing a light distribution pattern emitted from the headlight main body to the front of the vehicle.

[Explanation of symbols]

10, 10 'headlamp main body 12 Transparent cover 14 Lamp body 20 Lamp unit 22 Discharge bulb 22a Discharge light emitting section (light source) 24 Reflector 24a Reflective surface 24b Motor accommodating section 24c Tab 26 Holder 28 Condensing lens 30 Retaining ring 32 Shade 32A Shade main body part 32Aa Upper end edge 32B Substantially semi-cylindrical part 32C Bracket part 34 Shade drive mechanism 36 Rotating pin 38 Motor drive part 38a Output shaft 40 Tension coil spring 42 Light distribution variable control mechanism 50 Aiming mechanism 52 Aiming screw 54 Aiming bracket 56 Aiming nut 60 Unit tilt control mechanism 62 Motor 62a Output shaft 70 Lamp unit for wide diffusion irradiation (other lamp unit) 72 Unit support member 74 Halogen bulb 76 Reflector 6a Reflecting surface 100 Vehicle headlamp 102 Shade drive circuit 104 Unit drive circuit 106 Control unit 108 Beam switch 110 Steering angle sensor 112 Vehicle speed sensor 114 Vehicle distance sensor 116 Vehicle height sensor Ax Optical axis A Aiming fulcrum B Aiming operation point CL Cut-off line F1 First focus F2 Second focus HZ Hot zone (high light intensity area) P (H) High beam light distribution pattern P (L) Low beam light distribution pattern P (w) Wide diffuse light distribution pattern

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[Procedure amendment]

[Submission date] March 13, 2001 (2001.3.1.
3)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 9

[Correction method] Change

[Correction contents]

FIG. 9

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F21V 13/00 F21M 3/05 B // F21W 101: 10 F21Y 101: 00

Claims (4)

[Claims] 1. A vehicular headlamp in which a lamp unit for irradiating a beam forward in a predetermined light distribution pattern is accommodated inside a lamp body, wherein the constituent elements of the lamp unit are determined according to a vehicle running condition. A vehicle light control device comprising: a light distribution variable control mechanism that moves the light distribution pattern to change the light distribution pattern; and a unit tilt control mechanism that tilts the lamp unit in a vertical direction according to a vehicle traveling condition. Illumination. 2. A light source in which the lamp unit is disposed substantially coaxially with an optical axis extending in a vehicle front-rear direction, a reflector for reflecting light from the light source toward the optical axis toward the front, and a reflector for the reflector. A condenser lens provided in front,
2. The vehicle headlight according to claim 1, further comprising: a shade provided between the condenser lens and the reflector, for shielding a part of light reflected from the reflector. 3. The vehicle headlight according to claim 2, wherein the variable light distribution control mechanism is configured to move the shade to change the light distribution pattern. 4. The lamp unit is supported by a unit supporting member together with another lamp unit, and the unit tilt control mechanism is configured to tilt the unit supporting member in a vertical direction. The vehicle headlight according to any one of claims 1 to 3, wherein